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  1. importPackage(java.io);
  2. importPackage(java.lang);
  3.  
  4. function sumTo(n){
  5. 	if (n > 1){
  6. 		return n + sumTo(n-1)
  7. 	} else {
  8. 		return n
  9. 	}
  10. }
  11.  
  12. print(sumTo(4))
  13.  
  14. function sumToFourExplained(n){
  15. 	// n = 4
  16. 	if (n > 1){ // n = 4
  17. 		return n + (function(m){
  18. 			if (m > 1){ // m = 3
  19. 				return m + (function(k){
  20. 					if (k > 1){ // k = 2
  21. 						return k + (function(l){
  22. 							if (l > 1){ // l = 1
  23. 								return l // + func... and so on
  24. 							} else {
  25. 								return l
  26. 							}
  27. 						})(k-1) // l = k - 1 = 1
  28. 					} else {
  29. 						return k
  30. 					}
  31. 				})(m-1) // k = m - 1 = 2
  32. 			} else {
  33. 				return n
  34. 			}
  35. 		})(n-1) // m = n - 1 = 3
  36. 	} else {
  37. 		return n
  38. 	}
  39. }
  40.  
  41. print(sumToFourExplained(4))
  42.  
  43.  
Success #stdin #stdout 0.45s 321856KB
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10
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https://ideone.com/Z4mpc4
language:
JavaScript (rhino 1.7.9)
created:
9 years ago
visibility:
public

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